Madurapperuma, W.S.Kumaragama, D.2014-06-032014-06-032008Communication in Soil Science and Plant Analysis, 39:p.1773-1790https://dl-cri.nsf.gov.lk//handle/1/3880Evaluation of ammonium bicarbonate diethylene triamine penta acetic acid as a multinutrient extractant for acidic lowland rice soils